A Novel Filter Extracted Equivalent Control Based Fixed Frequency Sliding Mode Approach for Power Electronic Converters

Yasin, Abdul Rehman; Ashraf, Muhammad; Bhatti, Aamer Iqbal

doi:10.3390/en12050853

Cited by 11 publications

(12 citation statements)

References 58 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…However, its major drawback is its varying switching frequency which is a major requirement for power electronic converters. They need to operate at fixed frequency in order to minimize the switching losses and suppress Electromagnetic Interference (EMI) [43][44][45][46][47]. In [43], a new technique based on fixed frequency SMC has been proposed.…”

Section: Inner Control Loopmentioning

confidence: 99%

“…They need to operate at fixed frequency in order to minimize the switching losses and suppress Electromagnetic Interference (EMI) [43][44][45][46][47]. In [43], a new technique based on fixed frequency SMC has been proposed. This filter extracted method provides increased robustness and improved dynamic response in comparison with the previously mentioned techniques.…”

Section: Inner Control Loopmentioning

confidence: 99%

“…Here the filter capacitor instantaneous current is given by i(t). As reported in [38,43] the filter provides the equivalent control under the following condition:…”

Section: Proposed Controllermentioning

confidence: 99%

See 2 more Smart Citations

Filter Extracted Sliding Mode Approach for DC Microgrids

Yasin

Riaz

et al. 2021

Electronics

View full text Add to dashboard Cite

The advantages offered by DC microgrids, such as elimination of skin effect losses, no requirement of frequency synchronization and high efficiency for power transmission are the major reasons that microgrids have attracted the attention of researchers in the last decade. Moreover, the DC friendly nature of renewable energy resources makes them a perfect choice for integration with DC microgrids, resulting in increased reliability and improved stability. However, in order to integrate renewable energy resources with the DC microgrids, challenges like equal load sharing and voltage regulation of the busbar under diverse varying load conditions are to be addressed. Conventionally, droop control with PI compensation is used to serve this purpose. However, this cascaded scheme results in poor regulation to large load variations and steady state errors. To address this issue, this paper presents a sliding mode control-based approach. Key features of SMC are its ease of implementation, robustness to load variations, and fast dynamic response. The system model is derived and simulated to analyze the stability and performance of the proposed controller. An experimental test bench is developed to demonstrate the effectiveness of SMC against modeled dynamics and is compared with the droop controller. The results show an improvement of 26% and 27.4% in the rise time and settling time, respectively. Robustness of the proposed scheme is also tested by switching it with a step load and an improvement of 40% has been observed.

show abstract

Section: Inner Control Loopmentioning

confidence: 99%

Section: Inner Control Loopmentioning

confidence: 99%

See 1 more Smart Citation

Filter Extracted Sliding Mode Approach for DC Microgrids

Yasin

Riaz

et al. 2021

Electronics

View full text Add to dashboard Cite

show abstract

“…As illustrated in Figure 1, after extracting u eq , the control signal V c is PWM implemented, using the ramp carrier signal with peak amplitude V p and switching frequency f s . For stable operation, the peak amplitude of the carrier signal V p must be higher than the amplitude of control signal V c [38].…”

Section: Sliding Mode Controlmentioning

confidence: 99%

Robust Sliding Mode Control of a Unipolar Power Inverter

et al. 2021

View full text Add to dashboard Cite

The key issue in the practical implementation of the sliding mode (SM) control–based power inverter is the variable switching frequency. This variable switching frequency not only induces electromagnetic interference (EMI) noise, but also reduces the efficiency of the inverter, as the size of the inductor and capacitor does not alter in tandem with this variable frequency. In this context, fixed switching frequency–based SM control techniques are proposed; however, some of them are too complex, while others compromise the inherent properties of SM control. In this research, a fixed frequency SM controller is proposed, which is based on the novel low-pass filter extraction of the discontinuous control signal. This allows the technique to be implemented with fewer hardware components, thus reducing the complications of implementation, while maintaining the robustness and parametric invariance of SM control. A simulation-based comparison with an existing pulse width modulated (PWM) SM controller is presented as the benchmark. In comparison with the sigmoid function SM controller, an improvement of 50% in the settling time along with zero steady-state errors and a further 37% and 42% improvement in the undershoot and overshoot, respectively, is reported in the simulation. A hardware setup is established to validate the proposed technique, which substantiates the simulation results and its disturbance rejection properties.

show abstract

“…Other techniques have been designed such as the MPPT, which is based on the dedicated sliding mode controller for PV storage systems [17,18]. This approach is of great importance given its several advantages such as stability, robustness against the parameter variation, fast dynamic response and the simplicity of implementation [19,20]. However, the SMC-MPPT approach, when applied to the dc-dc converter, has certain drawbacks, including the variability of the operating frequency in the output of the control (chattering phenomenon) [17,[21][22][23][24].…”

Section: Introductionmentioning

confidence: 99%

Practical Implementation of the Backstepping Sliding Mode Controller MPPT for a PV-Storage Application

et al. 2019

View full text Add to dashboard Cite

This study presents a design and an implementation of a robust Maximum Power Point Tracking (MPPT) for a stand-alone photovoltaic (PV) system with battery storage. A new control scheme is applied for the boost converter based on the combination of the adaptive perturb and observe fuzzy logic controller (P&O-FLC) MPPT technique and the backstepping sliding mode control (BS-SMC) approach. The MPPT controller design was used to accurately track the PV operating point to its maximum power point (MPP) under changing climatic conditions. The presented MPPT based on the P&O-FLC technique generates the reference PV voltage and then a cascade control loop type, based on the BS-SMC approach is used. The aims of this approach are applied to regulate the inductor current and then the PV voltage to its reference values. In order to reduce system costs and complexity, a high gain observer (HGO) was designed, based on the model of the PV system, to estimate online the real value of the boost converter’s inductor current. The performance and the robustness of the BS-SMC approach are evaluated using a comparative simulation with a conventional proportional integral (PI) controller implemented in the MATLAB/Simulink environment. The obtained results demonstrate that the proposed approach not only provides a near-perfect tracking performance (dynamic response, overshoot, steady-state error), but also offers greater robustness and stability than the conventional PI controller. Experimental results fitted with dSPACE software reveal that the PV module could reach the MPP and achieve the performance and robustness of the designed BS-SMC MPPT controller.

show abstract

A Novel Filter Extracted Equivalent Control Based Fixed Frequency Sliding Mode Approach for Power Electronic Converters

Cited by 11 publications

References 58 publications

Filter Extracted Sliding Mode Approach for DC Microgrids

Filter Extracted Sliding Mode Approach for DC Microgrids

Robust Sliding Mode Control of a Unipolar Power Inverter

Practical Implementation of the Backstepping Sliding Mode Controller MPPT for a PV-Storage Application

Contact Info

Product

Resources

About